Improve led matrix options documentation

And enable hyphen values in clap.
You were not able to output a string like '---' previously.

Author: xeruf

inputmodule-control/src/inputmodule.rs

@@ -160,7 +160,7 @@ pub fn find_serialdevs(args: &crate::ClapCli, wait_for_device: bool) -> (Vec<Str
 pub fn serial_commands(args: &crate::ClapCli) {
     let (serialdevs, waited): (Vec<String>, bool) = find_serialdevs(args, args.wait_for_device);
     if serialdevs.is_empty() {
-        println!("Failed to find serial devivce. Please manually specify with --serial-dev");
+        println!("Failed to find serial device. Please manually specify with --serial-dev");
         return;
     } else if args.wait_for_device && !waited {
         println!("Device already present. No need to wait. Not executing command. Sleep 1s");
@@ -843,7 +843,7 @@ fn show_font(serialdev: &str, font_items: &[Vec<u8>]) {
 }
 
 /// Render a list of up to five symbols
-/// Can use letters/numbers or symbol names, like 'sun', ':)'
+/// Can use letters/numbers or symbol names, like 'sun' ':)'
 fn show_symbols(serialdev: &str, symbols: &Vec<String>) {
     println!("Symbols: {symbols:?}");
     let font_items: Vec<Vec<u8>> = symbols.iter().map(|x| convert_symbol(x)).collect();

inputmodule-control/src/ledmatrix.rs

@@ -100,20 +100,20 @@ pub struct LedMatrixSubcommand {
     #[arg(long)]
     pub clock: bool,
 
-    /// Display a string (max 5 chars)
-    #[arg(long)]
+    /// Display a string vertically (max 5 chars - letters, digits, punctuation)
+    #[arg(long, allow_hyphen_values = true)]
     pub string: Option<String>,
 
-    /// Display a string (max 5 symbols)
-    #[arg(long, num_args(0..6))]
+    /// Display a string vertically (up to 5 symbols as separate arguments by symbol name or string)
+    #[arg(long, allow_hyphen_values = true, num_args(0..6))]
     pub symbols: Option<Vec<String>>,
 
     /// Start a game
     #[arg(long)]
     #[clap(value_enum)]
     pub start_game: Option<Game>,
 
-    /// Paramater for starting the game. Required for some games
+    /// Parameter for starting the game. Required for some games
     #[arg(long)]
     #[clap(value_enum)]
     pub game_param: Option<GameOfLifeStartParam>,